نتایج جستجو برای: x ray ct

تعداد نتایج: 753974  

Journal: :IEEE Transactions on Biomedical Engineering 2014

Journal: :Journal of Physics: Conference Series 2006

2017
Kristine M. Jespersen Lars P. Mikkelsen

The data published with this article are high resolution X-ray computed tomography (CT) data obtained during an ex-situ fatigue test of a coupon test specimen made from a non-crimp fabric based glass fibre composite similar to those used for wind turbine blades. The fatigue test was interrupted four times for X-ray CT examination during the fatigue life of the considered specimen. All the X-ray...

Journal: :Medical physics 2005
Jiehua Zhu Shiying Zhao Yangbo Ye Ge Wang

Accurate and efficient simulation of an x-ray transform for representative structures plays an important role in research and development of x-ray CT, for the evaluation and improvement of CT image reconstruction algorithms, in particular. Superquadrics are a family of three-dimensional objects, which can be used to model a variety of anatomical structures. In this paper, we propose an algorith...

2015
Carlo Liguori Giulia Frauenfelder Carlo Massaroni Paola Saccomandi Francesco Giurazza Francesca Pitocco Riccardo Marano Emiliano Schena

X-ray computed tomography (CT) has recently been experiencing remarkable growth as a result of technological advances and new clinical applications. This paper reviews the essential physics of X-ray CT and its major components. Also reviewed are recent promising applications of CT, ie, CT-guided procedures, CT-based thermometry, photon-counting technology, hybrid PET-CT, use of ultrafast-high p...

Ali Reza Shakibafard Fariba Zarei, Mahdi Dodangeh Reza Jalli, Rezvan Ravanfar Haghighi, S. Chatterjee Sepideh Sefidbkht Somayeh Gholami Bardeji Vani VC

Introduction: The basis of image formation in Computed Tomography (CT) lies in the x-ray linear attenuation coefficient of the scanned material. Compton scattering and photoelectric effect are the dominant interactions of the x-ray photons with the subject, in the range of diagnostic radiology. These two coefficients are important in tissue characterization by Dual-Energy CT (D...

Journal: :iranian journal of radiology 0
myeong seong kim department of radiology, the korean national cancer center, goyang, republic of korea; graduate school of public health and institute of health and environment, seoul national university, seoul, republic of korea jong-woong lee department of radiology, kyung hee university hospital at gang-dong, seoul, republic of korea sun geun kim department of radiological technology, baekseok culture university, cheonan, republic of korea dae cheol kweon department of radiological science, shinhan university, uijeongbu, republic of korea; department of radiologic science, shinhan university, uijeongbu-shi, republic of korea. tel: +82-318703416, fax: +82-318703419

conclusion scout views may be useful in determining dose and image quality in ct scanning; however, it is necessary to first determine the most appropriate scout view for ct scans. background while using the automatic exposure control technique in computed tomography (ct), the scout view determines the radiation dose for the ct scan by taking anatomical morphology into consideration. objectives...

Journal: :Diagnostic and interventional radiology 2016
Yeun Yoon Kim Hyun Joo Shin Myung Joon Kim Mi-Jung Lee

PURPOSE We aimed to evaluate the use of a dose monitoring program for calculating and comparing the diagnostic radiation doses in pediatric patients with neuroblastoma. METHODS We retrospectively reviewed diagnostic and therapeutic imaging studies performed on pediatric patients with neuroblastoma from 2003 to 2014. We calculated the mean effective dose per exam for X-ray, conventional comput...

Background: The accuracy of reduction of ankle fractures using postoperative plain radiographies (x-ray) remainswidely controversial. Some authors have demonstrated that postoperative computed tomography (CT) scan can beuseful for these patients. In current study, the efficacy of x-rays after fixation of ankle fractures was investigated basedon the CT scan findings.Metho...

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